KEY EXAM-2 Su13 - Exam No Summer 2013 CHEM-13 1 1 Exam-2...

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Unformatted text preview: Exam No: Summer 2013 CHEM-13 1 1 Exam-2 Name 7 Each Question is 4 points Total Points: 100 Bonus Questions: 1 Scantron Use In general: 1. For this exam, you are allowed to use a non-programmable and non— graphing calculator that you bring to your desk. You MAY NOT borrow another person’s calculator. You MAY NOT use your cell phone, PDA, or other non—calculator device as a calculator. 2. use #2 pencil ONLY to fill out Scantron sheet, not a pen or marker 3. when filling in bubble on the scantron, be sure to fill in bubble completely, and only one bubble for each entry; pay attention to line numbers on the scantron so that you put the answer in the correct spot 4. when you first get the exam, check to make sure you have all pages of the exam and one periodic table. You should also have one scantron sheet. If you don’t have any of these, contact us immediately. 5. we will announce periodically how much time has elapsed/are left 6. if you have a question, ask (if taking the exam at disability services, let your assistant know and they can call immediately to get an answer to your question) FILLING IN SCANTRON PERSONAL INFO: Bubble info: 1. ID. NUMBER: 3-digit exam number (left justified) 2. NAME: LAST NAME space FIRST NAME space MI (left justified) 3. TEST FORlVI: Enter A 4. SUBJECT SCORE: Leave it Blank Vertical lines: 1. NAME: “Write your name” GOOD LUCK! l) The correct name for Mn(CH3C02)4 is A) manganesefll) carbonate anganese(IV) acetate 7 C) manganese(lV) carbonate D) manganesefll) acetate 2) The compound, N02, is named A) nitrogen(IV) oxide. B) nitrate. Gflfitrogen dioxide, 1’ D) nitrite. 3) Which is the most acceptable electron dot structure for N2H2‘? rnH—N—N—H QH—NEN—H mH—NEN—H 4) Consider a molecule with the following connections: 0 | H—O— wo—D—H When a valid electron dot structure is written, how many double bonds will the molecule contain? town)?" B) 1 00 m4 5) Write a Lewis structure for barium fluoride. A) [Bari—[1E1]- Marietta:- C) [Bat] D) F—B—F E) [Bail 6) KH2PO4 is stfltfiiotassium dihydrogen phosphate. B) potassium hydrogenfll) phosphate. C) potassium dipho sphate. ' D) hydropotassium phosphate. 7) Assign formal charges to all atoms in the following resonance form for HNO3 (aq). (a) :0: £— i H— o—eN—ii: IF (c) A) 0 for all atoms B) +1 for H, —2 for each oxygen, +5 for N C) +1 for N and H, -1 for oxygen (a) and oxygen (0), 0 for oxygen (b) bwirBj‘iwaor N, -1 for oxygen (c), O for all other atoms 8) Which of the following should be nonlinear? I II III A) only III B) II and III Kaye—)‘fifiy II D) only I 9) Choose the best Lewis structure for OClz. Lflfli—QWQ: B) ZQlflOwCli C) :r'gm o=c1j2 D) i161=§§rriil= E) £3} = §=C£z 10) Which statement is correct for the structure shown? H\1 2/H CZC H H\C/ \g/ H/ \CSC/ \H H/ \H A) The molecule contains a delocalized TC bond system. B) Carbon no. 1 is described by Sp hybridization. C) The molecule contains a total of 16 0 bonds. t;_/D)“Carbon no. 3 is described by SP3 hybridization. 11) Determine the name for COC12'6H20. A) cobalt (II) chloride heptahydrate B) cobalt (I) chloride What (II) chloride hexahydrate D) cobalt (I) chloride heptahydrate E) cobalt chloride hydrate 12) In which of the molecules below is the carbon-carbon distance the shortest? A) H3C—CH3 k/ZBTT-l-CEC-H r C) H2C=CH2 D) H3C-CH2—CH3 E) H2C=C=CH2 13) Complete combustion. of a 0.500 g sample of a pure hydrocarbon yielded 0.973 g C02 and 0.319 g H20. What is the empirical formula of this hydrocarbon? A) C3H5 B) C2H3 C) C6H9 l4) Identify the ideal bond angles marked a, b, and e in the molecule below : H H 3i): l a | b C. , 1.;me CLQE‘QWH «- a l 7 H A)109.5°, 10952109.? B) 109.50, 109.50, 90° j/erroasa 109.5°, 120° D) 90°, 180°, 90° E) 120°, 109.5°,‘120° 15) The molecular geometry of the PF3 molecule is , and this molecule is A) trigonal planar, polar B) tetrahedral, polar C) trigonal planar, nonpolar wzwaTtrigonal pyramidal, polar E) trigonal pyramidal, nonpolar 16) What is the O—N—O ideal bond angle in N03“? 5“"/""7’*)”1“‘200 B) greater than 1800 C) less than 10950 D) 109.50 17) The Lewis structure of the nitrate ion (N 03') does NOT have A) an octet around all the atoms in the structure. rw/BTTU electrons around the N atom. C) a formal charge of +1 on the N atom. D) three resonance structures. 18) How many of the following molecules have sp3d hybridization on the central atom? SiCl4 BrF5 AsF5 BIF3 A)0 B)l (3)4 /ej'fi‘ E) 3 19) Which of the following is a molecular compound? A) Sr12 B) thS C) LiQI-l O 10 E) NaCN 20) Give the formula for sulfurous acid. A) H2804 21) What is the empirical formula for ethyl fluoride if the compound contains 49.97% carbon, 10.51% hydrogen, and 39.52% fluorine by mass? A) Cstz B) C4H10F2 C) C4H10F4 Runyfi’zasr 22) How many resonance structures are required in the electron—dot structure of CO32-‘? A) two W%ee C) five D) four 23) What is the approximate carbon—oxygen bond order in CO32-? A) 2 B) 1 -M€)fi/3 D) 5/3 24) What is the molecular geometry of TeCl4? A) tetrahedral B) square pyramidal C) square planar Wflseesaw 25) What is the molecular geometry and orbital hybridization around the phosphorus atom in the PF4+ ion? bffifiwtgtrahedral, Sp3 B) square planar, Sp3d2 C) seesaw shaped, sp3d D) square pyramidal, Sp3d. 26) Choose the best Lewis structure for NH4+. A) Potentially Useful Information 1 Rydberg Equation constant (for Hydrogen): RH = 109,678 cm— Constant for Bohr model of H atom: b = 2.18 x 10h18 J Speed oflight: c 2 2.998 x 108 n1 5—1 Planck’s constant: h z 6.63 x 10“34 J s 1 J = 1 kg m2 5—2 61666616: mass (me) : 9.1093897 x 10‘28 g charge (e) = —1.60 x 10‘19 c proton: mass = 1.673 X 10"24 g ' neutron: mass 2 1.675 X 10~24 g 1 [11016 = 6.022 x1023 Ed Ea Efl $6 3&3 SE 3;“ Q _ mm 33 3mg EautuE< 83:22; Eicsmoz EEEED EsEzusem Egret. God £222.55 552392 EEEUEDE EafiEum EEEBEE EEEoEmU Eszufium EEEU b b 525.54. 5 oz 32 an E 5 mm Eu 8< :m m2 3 E i m: R: 2: 9: mm .3 3 mo 3‘“ mm mm 5 3 oh: QT: mamfl 2:: mi: . 3a: 3.2 Onw— vdm. . Eu: 3% _ de . SE 5323 5:55.; BEEF Esshm E353: Esioamam 6:55,“! 55:83 Eaafism EzraEam EEEDEPE Egg—€82 sash—Hogan.” E550 c 325534 3 8w E E o: E a. 5 am am am uz E 6 we 3 3 no 3 so an mm ENS ES 533 EEEcm EEEofium EEEED 5.65355“ E2391 :55 $3 a 88 “was 83 33 5:: | u ‘ ‘ I ‘ : SEEEm m. I .l .i. I: |.. 5 mm mm mm mm 5 E w: h: w: w: v: m: m: E: QUva 2:8 “38 Odom NEON jug odow m 3.. mow“ E.ch 2:354 5386; Magma 33 SEER E1552 . 533$. 5:35? :m E on E E :L mm mm 2/ me E 3 mm «m mm S E om 1. 0—2 méfl egg w. “NM hm: m4»: 91m: QNE :2 fimmv v5.3 5‘? 55% “2&2 Eagzfi. . .SoEzfiq EH EEuE EEEEU £2622 E255; Escunguuh 5:53:92 E5322 m ova H orb _ am am E GU PH 02 DZ cm. mm mm 3 on S» ww E“, N? 3» 35m 50.9.: 0mg... 3.3. 3.9.x Emma “v.3 voém oodm wmdw wodw 535 2.365 53:23.. 2.59% EamfiEbo Emu—«D uEN Encaman EEEnEU E2635» 9.3ng EEESm E235 i Q 5 mm 2 am no :N on mm 3.. mm mm _m on minm SNM 3.0m aqmm mod“ fl w _ uEEEU EEG mac—among SEE E=EEE< mm m2 6 m m fim E E 2 E E 2 Eda 09.3 90.5 5.3 8.3 . :2: =82 uEEEm 5mme cumoéz CEBU schem— . EuEuHu c< D $1.5 “:an Z NH 0 Z O m umEu>< 332 E m m __l o , m mmwwv PM E 9 E Q .anm .unEsc 255;. N E .H z 5 .3 fl. $ 3 m , § 03 m 52.5.: # Spawn: @290 4: vacuum r _ 95% :32 main ENE 353E 2: .3 2an ammotom ...
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